Umbrella stand



FIG. 1 Is a perspective view of my umbrella stand;

FIG. 2 Is a front view thereof;

FIG. 3 Is a rear view thereof;

FIG. 4 Is a left side view thereof;

FIG. 5 Is a right side view thereof;

FIG. 6 Is a top view thereof; and,

FIG. 7 Is bottom view thereof.

The broken line portions of the disclosure are for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for an umbrella stand, as shown and described. 